A Texas man has admitted guilt over the shocking murder of his wife.
Rodolfo "Rudy" Arellano, 36, revealed to cops that he attached a 119-pound block of concrete to his Elizabeth Arellano before throwing her into a lake.
The Fort Worth couple had been high school sweethearts and had four children together.
Elizabeth had gone out with colleagues on the evening of April 15, 2016. After leaving her friends, she went to her parents' house for the night, calling a co-worker to say that she had made it home safely.
By the time Elizabeth's mother reported her missing to Fort Worth police her daughter's body had already been found.
She was pulled from Lake Worth earlier that day after fishermen reported seeing something falling from the bridge.
A detective noted: "One witness described hearing what sounded like screams on the way down."
Police divers found Elizabeth's body and a rope had been tied around her neck.
The other end of the rope was attached to a large piece of concrete. The 28-year-old medical assistant was still wearing her medical scrubs.
Husband Rudy told police that he had been home on the night of the murder.
However, an investigation showed that cell phone pings and surveillance video placed him near Elizabeth's parents' home when she disappeared.
After searching his home detectives found that he had recently torn down a wooden fence for a friend.
The fence had posts encased in chunks of concrete that were similar to the one used to weigh down Elizabeth's body.
He initially pleaded not guilty but changed his plea on Wednesday.
The evil husband will face both her family and a judge in court next week where he is expected to receive a life sentence.
His attorney said the plea agreement was the "correct resolution" to the case.
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